html{
    height: 100%;
    font-size: 20px;
}

@media (max-width: 340px) {
    html{
        font-size: 18px;
    }
}

/*@media (min-width: 340px) and (max-width: 410px) {*/

/*}*/

@media (min-width: 410px) {
    html{
        font-size: 22px;
    }
}
body{
    max-width: 640px;
    height: 100%;
    margin: 0 auto;
    background: #f8f8f8;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}
.k-mask{
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right:0;
    background: rgba(0, 0, 0, .5);
    z-index: 300;
}
